From: Christoph Hellwig <hch@infradead.org>
To: David Rientjes <rientjes@google.com>
Cc: Andreas Dilger <andreas.dilger@oracle.com>,
Andrew Morton <akpm@linux-foundation.org>,
"Ricardo M. Correia" <ricardo.correia@oracle.com>,
linux-mm@kvack.org, Brian Behlendorf <behlendorf1@llnl.gov>
Subject: Re: Propagating GFP_NOFS inside __vmalloc()
Date: Wed, 17 Nov 2010 04:04:57 -0500 [thread overview]
Message-ID: <20101117090457.GA30543@infradead.org> (raw)
In-Reply-To: <alpine.DEB.2.00.1011162329570.13242@chino.kir.corp.google.com>
On Tue, Nov 16, 2010 at 11:37:39PM -0800, David Rientjes wrote:
> If you _really_ need 1MB of physically contiguous memory, then you'll need
> to find a way to do it in a reclaimable context. If we actually can
> remove the dependency that gfs2, ntfs, and ceph have in the kernel.org
> kernel, then this support may be pulled out from under you; the worst-case
> scenario for Lustre is that you'll have to modify the callchains like I
> suggested in my original email to pass the gfp mask all the way down to
> the pte allocators if you can't find a way to do it under GFP_KERNEL.
As Dave mentioned XFS also needs GFP_NOFS allocations in the low-level
vmap machinery, which is shared with vmalloc.
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next prev parent reply other threads:[~2010-11-17 9:05 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-10 20:42 Propagating GFP_NOFS inside __vmalloc() Ricardo M. Correia
2010-11-10 21:35 ` Ricardo M. Correia
2010-11-10 22:10 ` Dave Chinner
2010-11-10 22:10 ` Dave Chinner
2010-11-11 20:06 ` Andrew Morton
2010-11-11 22:02 ` Ricardo M. Correia
2010-11-11 22:25 ` Andrew Morton
2010-11-11 22:45 ` Ricardo M. Correia
2010-11-11 23:19 ` Ricardo M. Correia
2010-11-11 23:27 ` Andrew Morton
2010-11-11 23:29 ` Ricardo M. Correia
2010-11-15 17:01 ` Ricardo M. Correia
2010-11-15 21:28 ` David Rientjes
2010-11-15 22:19 ` Ricardo M. Correia
2010-11-15 22:50 ` David Rientjes
2010-11-15 23:30 ` Ricardo M. Correia
2010-11-15 23:55 ` David Rientjes
2010-11-16 22:11 ` Andrew Morton
2010-11-17 7:18 ` Andreas Dilger
2010-11-17 7:24 ` Andrew Morton
2010-11-17 7:37 ` David Rientjes
2010-11-17 9:04 ` Christoph Hellwig [this message]
2010-11-17 21:24 ` David Rientjes
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